html - 控制选择元素中显示的选项数量
所以我有一个下拉（选择）元素。问题是，如果其中有一个长列表，那么它会向上而不是向下“下降”。
有没有办法说它应该滚动而不是一次显示所有内容？
我知道有“大小”，但这就是一次可见的数量（我只想要一个可见，就像正常情况一样）
或者是因为它包含 div 而没有自动滚动条的原因？它是否需要知道它应该在哪里结束或者什么？
So I have a drop down (select) element. The problem is that if there is a long list in it, then it "drops" upwards instead of downwards.
Is there a way to say that it should scroll rather than show all of them at once?
I know there's "size" but that's how many are visible at once (I only want one visible, like normal)
Or is the reason it's not having a scrollbar automatically caused by it's containing div? Does it need to know where it should end or something?
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其工作方式取决于浏览器。除了使用 JS 构建自己的下拉菜单之外，您对此无能为力。
The way this works is up to the browser. Nothing you can do about it, other than building your own drop-down with JS.
问题不在于列表大小，它根据上方或下方的大小向上或向下下降，以便在可能的情况下始终显示整个列表。这是一种综合行为，我认为（而且我不想）你可以改变它。
The problem is not the list size, it drops upwards or downwards according the size above or below to always show the entire list if possible. It's a comprehensive behaviour and I don't think (and I don't want) you can change it.